This revelation comes in the wake of former Secretary of State Hillary Clinton’s press conference yesterday to discuss the growing controversy regarding her use of a private email account during her entire time in office.

NBC News’ Washington, D.C. affiliate, WRC, also broke a story today reporting that former Secretary of Defense Chuck Hagel used a private email account on an unknown number of occasions to conduct official business.

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These cases differ from Clinton’s exclusive use of a private email account in that Holder’s multiple aliases were “dot gov” emails through the Justice Department’s email system, and Hagel had both a government and a private email account. It is not clear at this point how often Hagel used his private Gmail account for official government business.

The Justice Department stated that Holder used three different aliases to help guard against security risks and as a means to keep his inbox from being flooded with emails. One of the aliases, the DOJ revealed today, was Henry Yearwood, a combination of his uncle’s first name and his mother’s maiden name. Another name he used was David Kendricks, an homage to two of his favorite band members from The Temptations, Eddie Kendricks and David Ruffin. The third was not released — it is the one he is currently using.

Clinton came under fire after the New York Times broke a story last week revealing that she never used a government email account, alias or otherwise, during her time in office, choosing instead to use a private address run through a server controlled by her. The congressional committee investigating the attack in Benghazi has been seeking access to the former secretary of state’s emails for many months.

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Rep. Trey Gowdy, R-S.C., chairman of the Benghazi committee, told CBS’sFace The Nation Sunday that “there are gaps of months and months and months” in the emails the committee had previously received from Clinton. “It’s not up to Secretary Clinton to decide what’s a public record and what’s not,” he insisted.

At a press conference yesterday, Clinton indicated she would continue to maintain full control of her email server; or, as John F. Harris, editor-in-chief of Politico put it, her response to the media and others who do not like it is, “Go to hell.”